All categories

2 years ago

PLEASE HELP!!!! 20 points

Mathematics

1 answer:

Vladimir79 [104]2 years ago

4 0

Answer:

Interval notation [-2, 0) U (0, 7]

Step-by-step explanation:

You might be interested in

Between which two ordered pairs does the graph of f(x) = x2 + x – 9 cross the negative x-axis? Quadratic formula: x =

katrin2010 [14]

(-6,0) and (-5,0) I got it right

8 0

2 years ago

Read 2 more answers

The 16 oz jar of Peanut Butter costs $4.82. What is the cost per oz?

mr_godi [17]

Answer:

$.30 per ounce

Step-by-step explanation:

Take the price and divide by the number of ounces to get the cost per ounce

4.82/16

$.30125 per ounce

Rounding to the nearest cent

$.30 per ounce

7 0

2 years ago

You are situated 300 feet from the base of Tower Glitz Plaza watching an external elevator descend down the side of the building

nordsb [41]

Answer:

18.66 ft/s

Step-by-step explanation:

The distance between you and the elevator is given by:

$h=\sqrt{x^2+y^2}$

The rate of change for the distance between you and the elevator is given by:

$\frac{dh}{dt}=\frac{dh}{dy}*\frac{dy}{dt}$

$-16=\frac{dh}{dy}*\frac{dy}{dt}$

$\frac{dh}{dy}=\frac{d}{dy} (\sqrt{x^2+y^2})\\$

Applying the chain rule:

$u=x^2+y^2\\\frac{dh}{dy}=\frac{d\sqrt u}{du} *\frac{du}{dy}\\\frac{dh}{dy}=\frac{1}{2\sqrt u} *2y\\\frac{dh}{dy}=\frac{y}{\sqrt {(x^2+y^2)}}$

Therefore, at x=300 and y = 500, dy/dt is:

$-16=\frac{y}{\sqrt {(x^2+y^2)}}*\frac{dy}{dt}\\-16=\frac{500}{\sqrt {(300^2+500^2)}}*\frac{dy}{dt}\\\frac{dy}{dt}=-18.66\ ft/s$

The elevator is descending at 18.66 ft/s.

7 0

3 years ago

-3/2 divided by 1/4

Jobisdone [24]

Answer:

-6

Step-by-step explanation:

7 0

2 years ago

Read 2 more answers

Line DCE is parallel to line AB

krek1111 [17]

Answer:

Angle DCA = Angle CAB. (Alternate Interior Angle)

Angle DCA = 68°

Angles(DCA + ACB + BCE) = 180°. (Linear Pair)

Angle ACB + 68° + 33° = 180°

Angle ACB = 79°

Therefore,

Angle ABC = 33°. (Alternate Interior Angle)

4 0

3 years ago